Furnace charging machine peels



Dec. 1., 1964 R. a. COTTRELL, JR., ETAL 3,159,291

FURNACE CHARGING MACHINE FEELS Filed Sept. '28, 1961 2 Sheets-Sheet 1 INVENTORS ROBERT B. COTTRELL, JR, AUGUSTUS C. BUZBY a 1964 R. B. COTTRELL, JR., ETAL 3,159,291

FURNACE CHARGING MACHINE FEELS 2 Sheets-Sheet 2 Filed Sept. 28, 1961 INVENTORS. ROBERT B. COTTRELL, JR., AUGUSTUS C. BUZBY 8: HUGH E. BEGGS United States Patent 3,159,291 FURNAGE CHARGING ltCiACI-IINE FEELS Robert B. Cottrell, J13, Gahniont, Augustus t3. Busby,

Franklin Township, Allegheny Eounty, and Hugh E.

Beggs, Upper St. Clair Township, Allegheny County,

Pa, assignors to Elms-Knox Company, Pittsburgh, P2,,

a corporation of Delaware Sept. 28, T1961, Ser. No. 141,533

4 Claims. (Cl. 214-26} This invention relates to furnace charging machine peels and particularly to shrouded peels for charging machines such as are used for charging scrap and other solid materials into open hearth furnaces by means of charging boxes.

In the charging of solid materials into furnaces, the solid materials are placed in charging boxes, which boxes are picked up on the end of a charging machine peel and inserted through the furnace doors into the hot interior of the furnace. During this operation of charging, the peel is alternately exposed to the high temperature of the furnace and then the cold atmosphere outside the furnace. One of the serious problems of such machines is fire cracking of the surface of the peel and ultimate failure due to these successive extreme temperature changes. Several efforts to solve this problem have been attempted. For example, bars are welded lengthwise along the peel in one form. These bars fire crack but are chipped off and replaced when they fail. Thus the small lengthwise bars act as a replaceable outer surface and thus protect the peel proper from fire cracking. However, this expedient is time consuming to apply and remove. It is expensive because of the extensive repeated welding and chipping which is required for each replacement.

The present invention provides a peel structure which eliminates these problems and provides a shrouded charging machine peel in which the shroud is quickly applied and removed with a minimum of time and effort.

Preferably we provide a charging machine peel, a thin walled metal shell adapted to slidably cover the charging machine peel, spacing means between the peel and the shell spacing the shell from the peel to create lengthwise air spaces between the peel and shell and vent means at the charging machine end of each air space. Preferably we rovide a heat-reflective surface on the exterior of the peel to reduce absorption of heat at such surface.

In the foregoing general description we have set out certain objects, purposes and advantages of our invention. Other purposes, objects and advantages of our invention will be apparent from a consideration of the following description and the accompanying drawings in which:

FIGURE 1 is a side elevation partly broken away of a first embodiment of our invention;

FIGURE 2 is a partial side elevation partly broken away of a second embodiment of our invention;

FIGURE 3 is a section on the line III-J11 of FIG- URE 2;

FIGURE 4 is a section on the line IVIV of FIG- URE 2;

FIGURE 5 is a partial side elevation partly broken away of athird embodiment of our invention;

FIGURE 6 is a partial side elevation partly broken away of a fourth embodiment of our invention;

FIGURE 7 is a partial side elevation partly broken away of a fifth embodiment of our invention;

FIGURE 8 is a section on the line VIIIVIII of FIG- URE 7;

FIGURE 9 is a side elevation of a sixth embodiment of our invention;

FIGURE 10 is a section on the line X-X of FIG- URE 9;

FIGURE 11 is a side elevation of a seventh embodiment of our invention;

FIGURE 12 is a section on the line XII-XII of FIG- URE 11;

FIGURE 13 is a section on the line XIII-X]1I of FIGURE 11;

FIGURE 14 is a side elevation of an eighth embodiment of our invention; and

FIGURE 15 is a section on the line XV-XV of FIG- URE 14.

Referring to the drawings in FIGURE 1, We have illustrated a tapered charging machine peel 10 provided with spaced lengthwise ribs 11 of increasing depth toward the charging box end with their outer edges defining a cylinder. Lugs 12 are formed at the charging machine end of ribs llll. A cylindrical sleeve 13 is slidably placed over ribs 11 by Welding two semi-cylinders lengthwise over the peel. A lock collar 14 is fixed to the end of the peel ill at the end opposite lugs 12. The surface of peel it) between ribs 11 may be coated with a heat-reiiecting material to further reduce absorption of heat at the surface of the peel.

In FIGURES 2, 3 and 4- we have illustrated a peel 29 having spaced longitudinal ribs 21 of increasing depth toward the charging box end as in FIGURE 1. Lugs 22 are formed at the charging machine end of ribs 21. A cylindrical sleeve 23 is freely slidable on ribs 21 and is formed by welding two half cylinders lengthwise over the peel. A lock ring 2 formed on peel 20 is spaced from cylindrical sleeve 23 to provide for expansion of sleeve 23.

In FIGURE 5 a peel Ziii is provided with ribs 31 similar to ribs ll of FIGURE 1. Lugs 32 are welded to the ribs Sleeve 33 is slidableover ribs 31 and is formed by sliding a cylinder over ribs 3i. or by welding two half cylinders lengthwise and held in place by lock ring 34 welded to the end of peel 3d.

In FIGURE 6 a peel 40 is provided with ribs 41 over which cylinder 42 is fitted (similarly to sleeve 33 in FIGURE 5) and Welded to the end of peel 46 by weldment 43.

In FIGURES 7 and 8 a peel 5th is provided with lengthwise ribs 1 carrying lugs 52 at the charging machine end and terminating in an annular shoulder 53. A sleeve 54 is placed over ribs 51 by welding two semi-cylinders lengthwise together. Stop segments 55 are welded to the interior, of sleeve 54 before welding of the semi-cylinders. These stop segments 55 prevent cylinder sleeve 54 from sliding by abuttin against shoulder 53.

In FIGURES 9 and 10 we provide a peel 60 of tapering section but Without longitudinal ribs. Spaced bars el and a stop ring 62 are welded to the peel adjacent the charging machine end and a shoulder 63 is formed on the peel 69 at the charging box end. Sleeve sections 64 which are concave towards the peel and may be halt-tubular in form as shown or other suitable arcuate or other section are placed side by side on the surface of peel es and retaining rings or hoops 65 and 66 are slid over the sections, one adjacent each end, and held in position by restraining beads 67 on each side of each ring 65 and 66.

In the embodiment of FIGURES ll, 12 and 13 the peel 79 is provided with a stop ring '71 and shoulder 72 corresponding to those of FIGURES 9 and i0. Similarly, asectional shield is provided consisting of arcuate sections 74 and retaining rings 75 and '76. However, the rings 75 and '76 are welded to the surface of sections 74 by weldments 77 thereby eliminating the need for spacer bars such as 61 of FIGURES 9 and 10.

In the form of peel illustrated in FIGURES 14 and 15, a tapered peel hit is provided with shoulder 81 at the charging box end. Side-by-side convex shield sections 82 are welded to the peel St) adjacent their center portions by weldments 83. Retaining rings Maud 35 at opposite ends of the shield sections are held in position by weldment beads 86 on the surface of the sections on opposite sides of each ring 84 and 85. In the embodiments shown-in FIGURES 1-8, ribs on the peel provide the spacing means for the shell and the lateral walls defining the lengthwise air spaces between the peel and shell; whereas in the embodiments illustrated in FIGURES 9-15, the'inwardly turned edges at the sections of the shell provide such spacing and walls.

While We have illustrated certain preferred forms of our charging machine peel it will be understood that this invention maybe otherwise embodied within the scope of the following claims.

We claim:

1. In a charging machine, an elongated peel, a metal shell member having an inner diameter greater. than'the eating with the atmosphere to permit movement 'ofair Within the space between the sheel and the peel.

2. In a charging machine, a peel as claimed in claim 1 wherein the spacer means are radial ribs on the peel surface.

3. In a charging machine, a peel as claimed in claim 1 having stop means between the peel and shell retainin'g,

the shell in place on the peel.

4. In a charging machine, a peel as claimed in claim 3 wherein the stop means are radial legs on the" spacer means adjacent one end of the peel and stop ring segments fixed to the shell means at the end opposite the legs and bearing against a shoulder on the peel at the end remote from said legs.

References Cited in the file of this, patent UNITED STATES PATENTS McLaughlin et al June 7, 1960 

1. IN A CHARGING MACHINE, AN ELONGATED PEEL, A METAL SHELL MEMBER HAVING AN INNER DIAMETER GREATER THAN THE OUTER DIAMETER OF THE PEEL SUBSTANTIALLY SURROUNDING SAID PEEL, AND SPACER MEANS BETWEEN THE PEEL AND THE SHELL SPACING THE SHELL FROM THE PEEL AND FORMING AIR PASSAGES BETWEEN THE SHELL AND THE PEEL, SAID PASSAGES COMMUNI- 